Sapphire Multiple Filament and Large Plate Growth Processes
Abstract
Progress on concurrent programs to establish manufacturing programs for the growth of single crystal sapphire in two shapes is reported. One process is for the simultaneous growth of 25 high strength continuous sapphire filaments while the other is for the growth of 12 in. X 12 in. transparent sapphire plates. The objective of the first program was to increase the production rate capability and decrease the cost of sapphire filament by designing, building, and operating a multiple filament machine. The successful achievement of these objectives are described, and recommendations for scaleup to further increase production capability and to decrease costs are given. Particular advancements in the technology of several components used in the filament process are reported. The objectives of the second program were to develop a system and to establish a manufacturing process for the growth of large sapphire plates. The design and assembly of a vacuum enclosure and a new concept for heating the growth setup are described. The successful optimization of the equipment and procedures for the growth of intermediate size (5 in. x 10 in.) sapphire plates is discussed, together with the partial achievement of the complete objectives. Analysis of the remaining optimization for the growth of high quality, full-scale plates is reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1972
- Accession Number
- ADB955163
Entities
People
- E. G. Roberge
- G. F. Hurley
- H. E. Labelle Jr.
- S. Isserow
- V. G. Kousky